Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 165
244 THEORETICAL AND PRACTICAL GRAPHICS. ^igr- 3SS- … Then gh equals GH, and hhi is the shadow of Hh. The projection jm catches the ray Mm at m. Then mf, equal to Mf, completes the construction. The timber, projecting from the vertical plane P Q R, illustrates the 60°-angle earlier mentioned. Kk being perpendicular to the vertical plane, its shadow Kl…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
